InvokeDynamicSupport.findVirtual fails with IllegalAccessException: symbolic reference class is not accessible #8987
Description
Environment Information
jruby 10.0.2.0 (3.4.2) 2025-08-07 cba6031bd0 OpenJDK 64-Bit Server VM 21.0.8+9-LTS on 21.0.8+9-LTS +indy +jit [arm64-darwin]- Both on local macOS 15.5 and in GitHub CI actions
Expected Behavior
https://github.com/rsim/mondrian-olap/ tests are running successfully on JRuby 9.4.x and Java 8, 11, 17, 21.
Actual Behavior
When trying to run https://github.com/rsim/mondrian-olap/ tests on JRuby 10.0.2.0 (as well as with previous 10.0.0.0 and 10.0.1.0 versions) and Java 21 then the following line https://github.com/rsim/mondrian-olap/blob/master/lib/mondrian/olap/result.rb#L277 fails with
Failure/Error: Unable to find org.jruby.dist/org.jruby.runtime.invokedynamic.InvokeDynamicSupport.findVirtual(InvokeDynamicSupport.java to read failed line
Java::JavaLang::RuntimeException:
java.lang.IllegalAccessException: symbolic reference class is not accessible: class jdk.proxy4.$Proxy49, from class org.jruby.runtime.invokedynamic.InvokeDynamicSupport (module org.jruby.dist)
# org.jruby.dist/org.jruby.runtime.invokedynamic.InvokeDynamicSupport.findVirtual(InvokeDynamicSupport.java:85)
# org.jruby.dist/org.jruby.ir.targets.indy.JavaBootstrap.createJavaHandle(JavaBootstrap.java:104)
# org.jruby.dist/org.jruby.ir.targets.indy.InvokeSite.buildNativeHandle(InvokeSite.java:441)
# org.jruby.dist/org.jruby.ir.targets.indy.InvokeSite.getHandle(InvokeSite.java:1153)
# org.jruby.dist/org.jruby.ir.targets.indy.InvokeSite.invoke(InvokeSite.java:781)
# home.runner.work.mondrian_minus_olap.mondrian_minus_olap.lib.mondrian.olap.result.️❤ def metadata #0(/home/runner/work/mondrian-olap/mondrian-olap/lib/mondrian/olap/result.rb:277)
See the full stack trace in https://github.com/rsim/mondrian-olap/actions/runs/17355575188/job/49268038963?pr=141
When I run the tests with JRUBY_OPTS="--dev" then they are successful. So it happens only when "invoke dynamic" is used.
When I examine the failing @raw_result_set.java_class I get this jdk.proxy4.$Proxy49 or similar.
As a workaround I found that if I replace
@raw_result_set.getMetaDatawith
method = @raw_result_set.java_class.java_method(:getMetaData)
method.accessible = true
method.invoke(@raw_result_set)then the call was successful. But this isn't a good workaround as many such methods could start failing in production when they don't fail in development when --dev flag is used.